Drilling apparatus



E. G. GARTIN:

DRILLING APPARATUS.

APPLICATION FILED DEC. 30. 1919.

1,435, 1 14h Patented Nov. 7, 1922.

Patented Nov. 7, i922 1,435,114 PATENT oaaica.

ELMER, GEORGE GARTIN, OF CLAREMONT, NEW HAMPSHIRE, ASSIGNOB TO SULLIVANMACHINERY COMPANY, A CORPORATION 01 MASSACHUSETTS.

DRILLING APPARATUS.

Application filed December 30, 1919. Serial No. 348,484.

To all whom it may concem:

Be it known that I, ELMER GEORGE GAR- TIN, a citizen of the UnitedStates, residing at Claremont, in the county of Sullivan and State ofNew'Hampshire, have invented certain new and useful Improvements inDrillin Apparatus, of which the following is a in clear, and exactspecification.

My invention relates to drilling apparatus.

Its object is to provide a simplified and improved form of mounting fora rock drill. Another object of my invention is to provide an improvedand simplified form of tool mounting whereby the drill and its feedmechanism may be moved toward and from the face of the work. A furtherobject of my invention is to provide an improved mounting inwhich theprocess of changing steels is greatly simplified. I

In the accompanying drawings I have shown, for purposes of illustration,one form which my invention may assume in practice. I

In these drawings,

Fig. 1 is a side elevation of a drill provided with a mounting embodyingthe illustrative form of my invention, parts being broken away tofacilitate illustration.

' Fig. 2 is a detail transverse section on the line 2-2 of Fig." 1.

In the drawings, a base 1 is provided, herein in the form of ,a trunnionadapted to be mounted upon any suitable support, and

on this base 1 is adjustably mounted, in an improved manner hereinafterdescribed, a

percussive motor 2 actuating a drill steel 3, the operation of thepercussive motor being controlled by a usual manual throttle valve 4and-its feed effected in a well known manner by the feed screw 5 andhandle 6. In my improved mounting, I have shown the percussive toolmounted upon a shell .7

- of well known construction with which the feed screw cooperates, butinstead of mountingthe shell directly onthe base 1, I haverigidlysecured in parallel relationship to the-shell a bar 10. This baris mounted in a guidefll secured to the base member 1' and may besuitably clamped in any desired position by the" guide 11, which is,herein, of

the split type, a clamp bolt 12 and nut 13 being 'shown herein as theclamp applying means. It will be obvious that by releasing the 'nut 13,the entire shell may be moved eral direction about the guide 11 or thatit may be rigidly secured in any desired position with respect thereto.

The operation of my device in the chang ing of a drill steel is asfollows: Let it be assumed that the usual limit of movement of the shellis materially less than the length of steel in use because of the depthof hole. It Wlll then be obvious that, as the steel cannot be movedlaterally at its rear end after disengagement from the chuck to clearthe percusslve motor'when the latter is in retracted osition, the toolcannot be withdrawn. ith my improved device, all that. is necessary todo, however, is, having released the tool from the chuck, to move itforward sufficiently to clear the front end of the chuck, and releasethe nut 13, move the percussive motor laterally about the guide 11 as apivot and draw the steel straight out. A longer steel may then beinserted into the hole and the motor 2 swung back into position and thesteel inserted again in the chuck.

It is thus seen that I have provided a mechanism whereby the position ofthe shell may bereadily adjusted, and that by the adjustable mounting Ihave provided means for enabling the ready change of steels.

While I have in this application specifically described one form whichmy invention may assume in practice, it will be understood that thisform of the same is shown for purposes of illustration and that theinvention may be modified and embodied in other forms without departingfrom its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. In combination with a rock drill, a shell upon which said rock drillis longitudinally adjustable, a base, and means for adjusting said shelllongitudinally with respect to said base and about said base as an axis.

2. In combination with a rock drill having a mounting relative to whichit is longitudi- I 3. In" combination with a rock drill v a 11 mountingcomprising a base, a shell, said rock drill being mounted on andlongitudinally adjustable with respect to said shell, a bar attached tosaid shell in parallel relationship thereto, a guide for said barsecured to said base, and means to clamp said bar in said ide. A r

4. n combination with a rock drill having a mounting relative to Whichit is longitudinally adjustable, a second mounting for said firstmentioned mounting comprising a guide, a bar'attached to said firstmentioned mountin extending through said guide, said guide and barconstituting means permittin mounting longitudinally with respect tosaid guide or about the same as an axis, and means for retaining saidfirst mentioned mounting in such adjusted position.

In testimony whereof I afiix my signature.

ELMER GEORGE GARTIN.

adjustment of said first mentioned 15

